Problem with music and image

I have a problem : I have a background music on my timeline and a background image, with the voice on the main audio channel, it looks like something like this! shotcut_2019-04-28_21-01-22|690x176

But when the music channel starts playing the music, the background image disapear but the other image, on the very top stays.
I know it’s a problem with the sound, but I can’t figure it out, please help me.

To be able to help effectively, more information would be advisable in order to reproduce the incident.
There are many variables to reach a conclusion.